Outdoor unit of an air conditioner



FIG. 1 is a front top perspective view of an air outdoor unit of an air conditioner showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a rear elevational view thereof; and,

FIG. 7 is a bottom plan view thereof. 

The ornamental design for an outdoor unit of an air conditioner, as shown. 